As a child I was not interested in science. I was merely interested in things human, the human side of nature, if you like, and I continue to be interested in that. That's what motivates me.

Nothing happens quite by chance. It's a question of accretion of information and experience.

A good parent gives their child roots and wings.

My life is pretty well at peace, and the profession is more of an avocation. It's a calling, if you like, rather than a job. I do what I feel impelled to do, as an artist would.

There is hope in dreams, imagination, and in the courage of those who wish to make those dreams a reality.

Your dreams tell you what to do; your reason tells you how to do it.

I think of the need for more wisdom in the world, to deal with the knowledge that we have. At one time we had wisdom, but little knowledge. Now we have a great deal of knowledge, but do we have enough wisdom to deal with that knowledge?